About Cassandra Kelleher, MD

Dr. Kelleher is a Pediatric General and Thoracic surgeon. Her clinical interests include lung disease and development, pediatric and adolescent gynecology, fetal care, adolescent bariatric surgery and pediatric cancer. She uses minimally invasive surgical techniques when ever appropriate.

Clinical Interests:



Mass General for Children: Pediatric Surgery
55 Fruit St.
Warren Building
11th Floor
Boston, MA 02114
Phone: 617-726-0270

Mass General for Children at Blue Hills Medical Center
340 Wood Rd.
Braintree, MA 02184
Phone: 888-644-3248

Mass General Brigham Healthcare Center at Foxborough
22 Patriot Place
Foxboro, MA 02035
Phone: 866-378-9164

Medical Education

  • MD, Harvard Medical School (Massachusetts)
  • Residency, Barnes Jewish Hospital
  • Residency, Brigham and Women's Hospital
  • Fellowship, Hospital for Sick Children

American Board Certifications

  • General Surgery, American Board of Surgery
  • Pediatric Surgery, American Board of Surgery

Accepted Insurance Plans

Note: This provider may accept more insurance plans than shown; please call the practice to find out if your plan is accepted.


Dr. Kelleher's laboratory studies late lung development, called alveolarization, that is delayed or impaired in many newborn lung diseases. She has developed a novel method to study the process of alveolar development that can be used to investigate new therapies that may improve lung development or regeneration in newborns and adults.


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